Metropolitan Washington Airport Authority

Environmental Permits

General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems (MS4) for Dulles Toll Road (Route 267)

The Metropolitan Washington Airports Authority (Airports Authority) is hereby authorized to discharge stormwater from the Dulles Toll Road (DTR) to surface waters of the Commonwealth of Virginia, provided that the Airports Authority files and receives acceptance of the registration statement by the Department of Conservation and Recreation (DCR).  The Airports Authority was issued a MS4 General Permit Registration Number VAR040120, effective July 19, 2010, that covers stormwater discharges only from the DTR.  The Airports Authority shall not be authorized by this general permit to discharge to state waters specifically named in other Department of Environmental Quality (DEQ) or DCR regulations or policies that prohibit such discharges, or to allow non-stormwater discharges that are excluded by the separate individual Virginia Pollutant Discharge Elimination System (VPDES) permit for Washington Dulles International Airport (Dulles).

The DTR MS4 permit requires the Airports Authority to prevent the discharge of pollutants such as engine oil, fertilizer, and trash from the DTR into waterways to the maximum extent practicable.  The permit also prohibits non-stormwater discharges into the storm drainage system, such as from sanitary sewer connections or illegal dumping.  Annual reports submitted to the DCR on October 1 of each permit year will summarize the management of stormwater runoff and limit non-point source pollution to the maximum extent practicable.  Annual reports upon completion will be made available on this web site.

Dulles Toll Road Description

The subject property includes the combined rights-of-way for the Dulles Airport Access Highway (DAAH) and DTR in Fairfax, Loudoun, and the City of Falls Church, Virginia.  The property is a highway and transportation right-of-way that is adjacent to residential and commercial properties.  The right-of-way for these highways and selected on- and off-ramps extends in an east-west direction from just west of the Magarity Road overpass on the east side of the corridor (inside the Washington Beltway [I-495] but before merging with I-66) to Route 28 on the west side of the corridor.  The total length of the right-of-way is approximately 14 miles.  The width of the right-of-way is approximately 700 feet.  Previously, the Virginia Department of Transportation (VDOT) operated the DTR under a contractual arrangement with the Airports Authority; however, a recently completed agreement transferred responsibility for operation of the DTR from VDOT to the Airports Authority.  Revenue from the Dulles Toll Road is to be used for future expansion of Washington Metropolitan Area Transit Authority (WMATA) rail service from the West Falls Church Metro Station to Dulles.

Stormwater runoff from the DTR is controlled by adherence to six Minimum Control Measures (MCM) in the VPDES Phase II regulations, as discussed in the enclosed DTR MS4 General Permit Program Plan.  For each MCM, the Airports Authority must identify Best Management Practices (BMPs) that reflect the best choices for how to satisfy the regulatory requirements.  A BMP is a technique, process, activity, or structure used to reduce the pollutant content of a stormwater discharge.  BMPs include simple nonstructural methods, such as good housekeeping and preventive maintenance. BMPs may also include structural modifications, such as the installation of retention measures.  BMPs are most effective when used in combination and customized to meet the specific needs (drainage, materials, activities, etc.) of a given operation.  The focus of DCR’s general permits is on preventive BMPs, which limit the release of pollutants into stormwater discharges.  The DTR General Permit includes the following BMPs:

1. Public Education and Outreach

  • Develop a DTR Environmental Permits web page at http://www.mwaa.com/tollroad/4630.htm.
  • Evaluate the effectiveness of educational videos and Public Service Announcements (PSAs) on this web page;
  • Develop a fact sheet for public distribution or download; and
  • The Airports Authority may also partner with adjacent MS4 operators to broadcast PSAs once in each permit 5-year cycle.

2. Public Participation/Involvement

  • Posting for public review DTR MS4 Program Plan, General Permit and subsequent annual reports on the Airports Authority DTR Evironmental Permits web page; and
  • Participate in local activities aimed at increasing public awareness of water quality and stormwater issues, as needed.

3. Illicit Discharge Detection and Elimination

  • Review training guidance and current practices and revise as necessary for use on the DTR, and provide Illicit Discharge Detection and Elimination (IDDE) training programs to appropriate audiences;
  • Revise illicit discharge identification and reporting protocols, and establish a means for the public to report illicit discharges;
  • Develop and maintain an updated inventory of roadway outfalls in MS4 urbanized areas of the DTR;
  • Notify in writing any downstream regulated MS4 to which the DTR’s MS4 is physically connected ; and
  • Expand existing process for reporting illicit discharges to appropriate authorities.

4. Construction Site Runoff Control

  • Develop and implement procedures for the receipt and consideration of information submitted by the public concerning the Airports Authority’s stormwater program.

5. Post-Construction Runoff Control

  • Incorporate controls into existing programs including updating a database of all known structural stormwater management facilities owned and operated by the Airports Authority; and
  • Perform yearly inspection and required maintenance on stormwater management facilities.

6. Pollution Prevention/Good Housekeeping

  • Review and revise as necessary the compliance procedures for maintenance activities;
  • Perform maintenance activities such as animal carcass removal and disposal, road cleaning, vehicle removal, etc. to minimize/eliminate potential sources of stormwater pollution;
  • Continue to implement procedures and training that will encourage employees and contractors to employ pollution prevention practices in day-to-day operations;
  • Include DTR wastes in the Airports Authority’s Waste Management Programs, which include annually evaluating waste management and recycling programs, and revise waste disposal procedures as necessary;
  • Ensure proper disposal of wastes from construction and maintenance activities in accordance with the DCR-approved erosion and sediment control, DEQ Waste Programs, and stormwater management standards and specifications through environmental compliance reviews;
  • Revise protocols and tracking procedure for performing environmental compliance assessments of DTR Facilities; and
  • Implement training courses for appropriate employees that promote a general awareness of stormwater management and pollution prevention, including advance hazardous waste management, in-stream maintenance activities, hazardous materials shipping, storage, and spill prevention of petroleum products, and pesticide applicator certification in accordance with all applicable Federal and State regulations.

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